Update dependency io.wcm:io.wcm.parent_toplevel to v2.8.0 (#47)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

pom.xml

@@ -24,7 +24,7 @@
   <parent>
     <groupId>io.wcm</groupId>
     <artifactId>io.wcm.parent_toplevel</artifactId>
-    <version>2.8.0-SNAPSHOT</version>
+    <version>2.8.0</version>
     <relativePath />
   </parent>